Error 18456 State 5 Invalid User ID and managing failed logins

28 May,2015 by Jack Vamvas

Error 18456 State 5 Invalid User ID appeared during some troubleshooting . The details were gathered using the RING_BUFFER_CONNECTIVITY

I cross checked against the SQL Server Error Logs and there was a related entry :

Login failed for user 'xxxxx'. Reason: Could not find a login matching the name provided. [CLIENT: xx.xxx.xx.x]
Reason: Could not find a login matching the name provided

The information was gathered during some troubleshooting for another problem, but it caused me to reflect on how to manage failed login attempts.

As a minimum for failed login attempts you should:

1) Turn on the Failed logins Only option on Login Auditing

2) Generate  a daily report using  Powershell and SQL Server Error Logs

3) Consider include failed logins to a SQL Server Security Violations Report

 

Read More on failed logins and other login issues

SQL Server - Login failed for user 'username'. The user is not ...

SQL Server - Error: 18456 – Login failed for user - SQL Server DBA

Troubleshooting Error: 18452, Severity: 14, State: 1 - SQL Server DBA

 


Author: Jack Vamvas (http://www.sqlserver-dba.com)


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